Brookfield Infrastructure Partners L.P. is a publicly traded limited partnership with corporate headquarters in Toronto, Canada, that engages in the acquisition and management of infrastructure assets on a global basis. Until a spin-off in January 2008, Brookfield Infrastructure was an operating unit of Brookfield Asset Management, which retains a 30 percent ownership and acts as the partnership's general manager. The company's assets carried a book value of US$21.3 billion, on December 31, 2016.